JP2002124027A - Data recording device and its method, data output device and its method, contents data, data recording medium, data reproducing device and their method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably distinguish whether contents are an original or a copy. SOLUTION: A contents header 2A is added to contents 1A. An original mark 3 is included in the contents header 2A. The copy of the original mark 3 is absolutely prohibited. Accordingly, the original mark 3 is not included in the contents header 2B of copied contents 1B. The copy of the original mark 3 may be prohibited by prohibiting the copy of the contents header itself. Furthermore, the copy of the original mark 3 may be substantially prohibited by changing the original mark 3 into a copy mark 4 having a prescribed bit pattern. Whether the contents are an original or a copy can be determined by the presence or absence of the original mark 3. Accordingly, copy restriction can be ensured. Besides, special service can be provided for the owner of original contents.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a data recording apparatus and method applied to, for example, music data, a data output apparatus and method, content data, a data recording medium, and a data reproducing apparatus and method.

[0002]

2. Description of the Related Art Music data copyright protection methods include SCMS (Serial Copy Management System) and CG.
MS (Copy Generation Management System) is known. SCMS is compatible with CD (Compact Disc), MD (Mini Di
sc), the first generation copy is permitted, and the second generation copy (grandchild copy) is prohibited. In the CGMS, generation is restricted such as copy prohibition or how many generations can be copied. To achieve these copy restrictions, SCMS
Bit and CGMS bit are prepared separately from the content data. These are collectively referred to as SCMS / CGMS bits. When the copy is made, SCMS / C
The generation information indicated by the GMS bit is advanced by one generation.

[0003]

The distinction between the original and the copy makes it possible to ensure a more restrictive copy, and also gives the owner of the original a privilege, thereby increasing the value of the original. It is possible to increase. The conventional copy restriction method cannot reliably distinguish the original from the copy. That is, when copying, the recording device is SCMS / CGM
Under the premise that the generation information represented by the S bit is always rewritten, it is possible to determine whether the content is an original or a copy based on the SCMS / CGMS bit. However, if the recording device does not update the SCMS / CGMS bits, the determination will not be correct.

In some cases, content is transmitted on a main channel, and SCMS / CGMS bits are transmitted on a sub-channel. When the content and the SCMS / CGMS bit are transmitted on different channels in this way, only the main channel is handled on a personal computer, for example, and the information indicating the original or the copy is lost. CD-R (CD-Res) on which content processed by a personal computer is recorded
cordable) and CDs sold as music software cannot be distinguished.

Accordingly, an object of the present invention is to provide a data recording device and method, a data output device and method, content data, a data recording medium, and a data reproducing device and method capable of reliably distinguishing an original from a copy. To provide.

[0006]

In order to solve the above-mentioned problem, the invention of claim 1 is characterized in that identification data indicating that the content data is original is attached to the content data, and the identification data is prohibited from being copied. Is a data recording device. The invention according to claim 5 is a data recording method, wherein identification data indicating that the content data is original is attached to the content data, and the identification data is prohibited from being copied.

According to a sixth aspect of the present invention, there is provided a data output device wherein identification data indicating that the content data is original is attached to the content data, and the identification data is prohibited from being copied. According to a seventh aspect of the present invention, there is provided a data output method in which identification data indicating that the content is original is attached to the content data, and the identification data is prohibited from being copied.

[0008] The invention of claim 8 is the content data accompanied by identification data indicating that it is an original.

According to a ninth aspect of the present invention, there is provided a data recording apparatus for recording, on a data recording medium, identification data indicating that the content data is original, the identification data being at least partially recorded on the data recording medium. A data recording device adapted to be associated with unique information data.
The invention according to claim 14 is a data recording method for recording on a data recording medium with identification data indicating original being attached to content data, wherein the identification data is at least partially information unique to the data recording medium. A data recording method adapted to be associated with data.

According to a fifteenth aspect of the present invention, there is provided a data recording medium on which content data is recorded with identification data indicating that the content data is original, wherein at least a part of the identification data is information data unique to the medium. And a data recording medium adapted to be associated with.

According to a sixteenth aspect of the present invention, there is provided a data reproducing apparatus for reproducing a content possibly accompanied by identification data indicating an original, wherein the identification data is separated and the separated identification data is determined. The data reproducing device controls the output of the identification data according to the determination result.
The invention according to claim 18 is characterized in that, when reproducing a content that may be accompanied by identification data indicating that it is an original, the identification data is separated, the separated identification data is determined, and the identification data is determined according to the determination result. This is a data reproducing method for controlling the output of the data.

According to the present invention, since the identification data accompanying the content data and prohibited from being copied and output is provided, it is possible to reliably distinguish between the original and the copy.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. FIG. 1 illustrates the concept of an embodiment of the present invention. A content header 2A into which data related to the content 1A is inserted is added to the content 1A such as music data and image data. An original mark 3 (represented by * in the drawing) is included in the content header 2A. Original mark 3
Is digital data of a predetermined bit pattern, for example. Copying of the original mark 3 is completely prohibited. That is, neither digital output nor analog output is output.

Therefore, the original mark 3 is not included in the content header 2B of the copied content 1B. As another example, the copy of the original mark 3 may be prohibited by prohibiting the copy of the content header itself. Further, the copy of the copy mark 3 may be substantially prohibited by changing the original mark 3 to a copy mark (indicated by a dot in the figure) 4 having a predetermined bit pattern.

As described above, since the original mark 3 is not output at the time of copying, even if the recording apparatus does not have a function of rewriting the bit related to the copy restriction, the original mark 3 is not included in the copied content. Not. Whether the content is an original or a copy can be determined by the presence or absence of the original mark 3. Therefore, copy restriction can be reliably performed.
Also, a special service can be provided to the owner of the original content.

FIG. 2 shows a configuration example for generating content data to which an original mark has been added. In FIG. 2, content data is supplied to an input terminal 11. Content data, for example, music content data is supplied. The content data may be data that has been compression-encoded to reduce the amount of data.

As the compression encoding, MPEG2 (Moving
Picture Experts Group Phase 2) AAC (Advanced Au
dio Coding), MP3 (MPEG1 Audio Layer III), AT
RAC (Adaptive Transform Acoustic Coding), ATR
AC3 or the like can be used. ATRAC3 improves ATRAC used in MD and realizes a higher compression ratio (about 1/10).

Content data is supplied to the encryption circuit 12. DES, RSA, etc. can be used for encryption. DES is one type of block encryption that performs encryption for each block. RSA is one of public key cryptography that uses different key data for encryption and decryption. Encryption circuit 1
2 is supplied to an error correction encoding circuit 13, where error correction encoding is performed. Error correction encoding circuit 13
Is supplied to the multiplexer 14.

The original mark is supplied to the multiplexer 14 from the input terminal 15. In the multiplexer 14, an original mark is added to the encrypted content data as a content header. Then, at the output terminal 16 of the multiplexer 14, transmission content data in which an original mark is added to the encrypted content data is generated. Although not shown, the transmission content data is distributed via a network or the like. In FIG. 2, the original mark may be used as a key of the encryption circuit 12, as indicated by a broken line.

FIG. 3 shows an example of a configuration for reproducing and recording (copying) the transmission content data generated as described above. Transmission content data is supplied to an input terminal indicated by reference numeral 21 and is separated into encrypted content data and an original mark by an original mark separation circuit 22. The encrypted content data has no original mark. However, when adding a copy mark, the encrypted content data may have a copy mark. The encrypted content data is supplied to an error correction circuit 23, where an error correction process is performed. The output of the error correction circuit 23 is supplied to an encryption decryption circuit 24, and the encryption is decrypted. The output of the decoding circuit 24 is taken out to an output terminal 25. A reproduction circuit (not shown) is connected to the output terminal 25, and reproduces content data such as music data.

The content data decoded by the decoding circuit 24 is supplied to the input terminal a of the switch circuit 26. One output terminal b of the switch circuit 26 is the output terminal 2
7 is derived. The other output terminal c of the switch circuit 26 is led out as an output terminal 28. A recording circuit (not shown) is connected to the output terminal 27, and the content data is recorded (copied) on a recording medium. In addition, a display control unit (not shown) is connected to the output terminal 28, and a message indicating that copying is not possible, for example, "Copying is not possible" is displayed.

The original mark separated by the original mark separation circuit 22 is supplied to an original mark identification section 29. When the original mark is included in the input transmission content data, the original mark is separated by the separation circuit 22. If the input transmission content data is copied, there is no original mark, so the separation circuit 22
Does not take out the original mark. When a copy mark is added at the time of copying, the separation circuit 22
From the copy mark.

The original mark identifying section 29 determines whether the input transmission content data is an original or a copy based on the presence or absence of the original mark, and generates a determination signal. The original /
The copy determination signal controls the switch circuit 26, and
It is taken out to the output terminal 30. A display unit (not shown) is connected to the output terminal 30, and displays whether the content is original content or copied content. Not only the display but also the information of the original or the copy may be notified to the system.

The input terminal a of the switch circuit 26 is connected to the output terminal b according to the output signal of the identification unit 29 indicating that the transmission content data is original. Thereby, the content data is supplied to the recording circuit through the output terminal 27, and the content is copied. That is, the first generation copy is possible. On the other hand, the identification unit 29
When the output signal indicates that the transmission content data is a copy, the copy of the second generation and thereafter is prohibited, so the input terminal a and the output terminal c of the switch circuit 26 are connected. This prohibits copying,
An indication that copying is not possible is displayed on the display unit.

The content having the original mark is
For example, it is distributed to a user via the Internet by a Web site. On the site side, by giving a privilege to the content with the original mark, that is, the original content owner, the original can be made more attractive than the copy.

FIG. 4 illustrates the provision of a privilege to the owner of the original content. Step S1
Indicates that the user has accessed the site. For example, as one of the services provided on the site, a service for the owner of the original mark is set. The user transmits the content data with the original mark added to the site.

In step S2, the site determines whether or not there is an original mark. If there is the original mark, in step S3, a service is provided to the owner of the original content. For example, benefits such as provision of concert information, preferential sale of concert tickets, and free download of certain songs are provided. If it is determined in step S2 that there is no original mark, in step S4, the provision of the service is stopped and a message to the user is sent. For example, "This has no original mark."
Is sent to the user. In this case, a service for the copy owner may be provided as shown in step S5 indicated by a broken line. Whether or not the user owns the copy can be determined by the presence of the copy mark in addition to the absence of the original mark.

FIG. 5 shows a basic configuration of a recording device (cutting device) when the present invention is applied to a recording medium, for example, a read-only optical disk. When recording and providing original content on an optical disc, it is preferable that the original mark and the optical disc have a close relationship. In the mastering device, laser light emitted from a gas laser or semiconductor laser is modulated by an optical modulator,
An optical pickup irradiates the disk-shaped glass master disk 44 coated with a photoresist as a photosensitive material. Thereby, data is recorded. The glass master 44 is controlled by servo such as tracking, focus, and spindle.

In the example of FIG. 5, a wobble key is supplied to the input terminal 41. The wobble key is supplied to the phase modulator 42. A sine wave wobbling signal is supplied from a terminal 43 to the phase modulator 42, and the phase of the wobbling signal is phase-modulated by a wobble key. A wobbling groove 45 is formed on the master disk 44 by the output of the phase modulator 42. The area between the grooves 45 is called a land.
The wobbling groove 45 is formed continuously spirally from the inner periphery to the outer periphery. The information of the wobbling groove can be used for tracking servo, spindle servo, synchronous clock generation, or absolute address.

FIG. 6 shows the phase modulation performed by the phase modulator 42. FIG. 6A shows a sine wave wobbling signal having a frequency of, for example, 22.05 kHz. FIG.
B indicates a part of the wobble key. The phase modulator 42 controls the phase of the wobbling signal according to the wobble key “0” and “1”, and generates a phase-modulated wobbling signal as shown in FIG. 6C. A wobbling groove 45 is formed on the master 44 by the wobbling signal after the phase modulation. As shown in FIG. 6D, the phase of the wobbling signal every two cycles may be modulated by each bit of the wobble key.

In FIG. 5, input terminals indicated by 46 are:
Data for generating an original mark is supplied. The data for generating the original mark is data of a key for encrypting the content. The converter 4 converts the data for generating the original mark and the wobble key (or a part of the wobble key).
7 is supplied. The converter 47 generates new data, that is, an original mark, by performing conversion processing from the data for generating the original mark and the wobble key. As the conversion process, a hash operation can be used. Alternatively, an original mark may be generated by performing a mixing process or encryption of two data.

The input terminal indicated by 49 is supplied with encrypted content data. The encrypted content data and the original mark from the converter 47 are combined with the multiplexer 48.
Supplied to In the multiplexer 48, a content header including an original mark is added to the content data. The output of the multiplexer 48 is supplied to an optical pickup (not shown) and recorded as pits on the master disk 44. The pit is formed in the wobbling groove and / or on the land. Wobbling grooves are formed first, and then pits are formed. Both may be formed simultaneously.

The glass master 44 recorded by the mastering device is developed and electroformed to produce a metal master, then a mother disk is created from the metal master, and then a stamper is created from the mother disk. Is done. An optical disk is created by a method such as compression molding or injection molding using a stamper. This optical disc has an original mark and is a medium for providing original content.

At the time of reproducing the optical disk manufactured as described above, the encrypted content data and the original mark can be reproduced by reproducing the pits. Also,
A reproduction signal of the wobbling groove can be obtained, and a wobble key can be reproduced by performing phase demodulation of the reproduction signal. In order to decrypt the data, the original mark and the wobble key are used, a conversion process reverse to the conversion process at the time of recording is performed, and wobble mark generation data is obtained. In other words, a wobble key is required to obtain wobble mark generation data. The wobble key is obtained after phase-demodulating the reproduction signal of the wobbling groove, and requires an optical disk. Therefore, the security of the original providing medium can be enhanced.

FIG. 7 shows a basic configuration in a case where original content downloaded by a personal computer for music distribution is recorded on a recordable optical disk. What is downloaded is data in which the original mark 53 is included in the encrypted content 51 and the content header 52. The original mark 53 is information (a key or the like) necessary to decrypt the content. Reference numeral 54 denotes a recordable optical disk. As a recordable optical disk, a rewritable optical disk or a write-once optical disk is used.

The optical disk 54 stores unique information (referred to as a unique disk ID) for uniquely identifying the disk. For example, a unique disc ID is recorded in a lead-in area 55 of the optical disc 54. The downloaded encrypted content is recorded on the optical disc 54, and the original mark 53 is supplied to the converter 56. The converter 56 is supplied with the unique disk ID. The converter 56 performs a conversion process of calculating both the original mark and the unique disk ID to generate a hash value. Mixing processing or encryption processing may be performed instead of the conversion processing.

The output of the converter 56 is recorded on the optical disk 54. The output of converter 56 is the original mark that has been converted to that unique to that disc. Further, the encrypted content 51 and the output of the converter 56 are
4, there is no need to record in the same area as long as cooperation is possible.

As described above, the optical disk 54 recorded by the system shown in FIG. 7 is a medium for providing original contents. That is, when the content is reproduced from the optical disc 54, an original mark is required to decrypt the encryption. The original mark is obtained by performing a reverse conversion process on the converted original mark and the unique disc ID. That is, if there is no unique disk ID, an original mark is generated and the encryption cannot be decrypted. In this way, the security of the downloaded original content can be increased. Note that a random number may be generated when the downloaded data is recorded on the optical disk 54 instead of the unique disk ID. Further, when the optical disc 54 has a wobbling groove, it may be used instead of the unique disc ID.

In the above embodiment, audio content was mainly described. However, video data other than audio data, electronic books, game software,
The present invention can be applied to content such as movie software in the same manner as described above. The original providing medium is not limited to the optical disk, but may be a semiconductor memory such as a removable flash memory.

[0040]

As is apparent from the above description, according to the present invention, since the copy-inhibited original mark is transmitted along with the content, the original and the copy can be reliably identified. . In addition, the content right holder can provide a service that gives a privilege only to the original owner. Thereby, it becomes more attractive to purchase the original, and the sales of the original can be expanded. Further, by closely relating the original mark and the original providing medium, the security of the original mark can be improved. That is, an original mark located in a place other than the original providing medium can be determined to be a fake.

[Brief description of the drawings]

FIG. 1 is a schematic diagram for explaining an outline of an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration example for producing content data according to an embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration example for recording or reproducing content in one embodiment of the present invention.

FIG. 4 is a flowchart for explaining a service provided to an original owner in one embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration example in which the present invention is applied to an optical disk mastering device.

FIG. 6 is a waveform chart used to explain the phase modulation operation in FIG.

FIG. 7 is a block diagram showing a configuration example in which the present invention is applied to an optical disk recording device.

[Explanation of symbols]

1A: original content, 1B: copied content, 2A, 2B: content header,
3 ... original mark, 4 ... copy mark, 4
2 ... Phase modulator, 44 ... Master, 45 ... Wobbling groove, 54 ... Recordable optical disk

Claims (18)

[Claims] 1. A data recording apparatus, wherein identification data indicating that the data is original is attached to the content data, and the identification data is prohibited from being copied. 2. The data recording device according to claim 1, wherein the identification data is not included in the copied content data. 3. The data recording apparatus according to claim 1, wherein the copied content data is accompanied by other identification data indicating that the content data is a copy instead of the identification data. 4. The data recording apparatus according to claim 1, wherein the content data is encrypted, and the identification data is information for decrypting the encryption. 5. A data recording method, wherein identification data indicating that the data is original is attached to the content data, and the identification data is prohibited from being copied. 6. A data output device wherein identification data indicating that the content is original is attached to the content data, and the identification data is prohibited from being copied. 7. A data output method, wherein identification data indicating that the content is original is attached to the content data, and the identification data is prohibited from being copied. 8. Content data accompanied by identification data indicating that the data is original. 9. A data recording apparatus for recording, on a data recording medium, identification data indicating original data to content data, wherein the identification data is at least partially information unique to the data recording medium. A data recording device adapted to be associated with data. 10. The data recording device according to claim 9, wherein the associating method is a mixing process, an encryption process, or a conversion process. 11. The data recording device according to claim 9, wherein the information data is recorded in advance. 12. The data recording device according to claim 9, wherein the information data is recorded later. 13. The data recording device according to claim 9, wherein the identification data is copy-prohibited. 14. A data recording method for recording, on a data recording medium, identification data indicating that the content data is original with the content data, wherein the identification data is at least partially information unique to the data recording medium. A data recording method made to be associated with data. 15. A data recording medium on which content data is recorded with identification data indicating that it is original, wherein the identification data is at least partially related to information data unique to the medium. Data recording medium. 16. A data reproducing apparatus for reproducing a content that may be accompanied by identification data indicating that the data is original, separating the identification data, determining the separated identification data, A data reproducing device that controls the output of the identification data according to a result of the determination. 17. The data reproducing apparatus according to claim 16, wherein the identification result is reported to a system. 18. When reproducing a content to which identification data indicating that it is original may be attached, the identification data is separated, the separated identification data is determined, and the separated identification data is determined according to the determination result. A data reproduction method for controlling the output of identification data.